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Data source: VAERS (Vaccine Adverse Event Reporting System)

Data through 2026 · Updated quarterly

Built by TheDataProject.ai · © 2026 VaccineWatch

Important: VAERS accepts reports of adverse events following vaccination. For any given report, there is no certainty that the reported event was caused by the vaccine. Reports may contain information that is incomplete, inaccurate, coincidental, or unverifiable. Most reports to VAERS are voluntary, which means they are subject to biases. This data cannot be used to determine if vaccines cause or contribute to adverse events.

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Important: VAERS reports alone cannot determine if a vaccine caused an adverse event. Reports may contain incomplete, inaccurate, or unverified information. Correlation does not equal causation.

  1. Home
  2. Vaccines
  3. HPV (Gardasil)
  4. Seizure like phenomena
HPV (Gardasil)×Seizure like phenomena

Seizure like phenomena Reports for HPV (Gardasil)

#165 most reported symptom for this vaccine

178
Reports
1
Deaths
17
Hospitalizations
0.56
Mortality Rate
%
9.6
Hosp. Rate
%

Seizure like phenomena and HPV (Gardasil)

Seizure like phenomena has been reported 178 times in association with HPV (Gardasil) vaccination in VAERS. This represents 0.4% of all 44,434 reports for this vaccine.

Among these reports, 1 mentioned death (0.56%) and 17 involved hospitalization (9.6%).

Seizure like phenomena is the #165 most frequently reported symptom for HPV (Gardasil) out of 2579 total symptoms.

Disclaimer: VAERS reports describe events that occurred after vaccination but do not establish that the vaccine caused the event. Many reported symptoms may be coincidental or related to underlying conditions.

What This Means

Seeing 178 reports of Seizure like phenomena after HPV (Gardasil) vaccination may seem alarming, but context is critical.

The mortality rate among these reports is very low at 0.56%, suggesting most cases are non-fatal.

Important Context

•Association, not causation: These reports show Seizure like phenomena occurred after vaccination, not that the vaccine caused it.
•Background rates: Seizure like phenomena may occur naturally at baseline rates in the population, unrelated to vaccination.
•Anyone can report: VAERS accepts reports from anyone — patients, parents, healthcare providers — without requiring medical verification.
•Denominator missing: VAERS counts reports, not rates per dose. Without knowing how many doses were given, raw counts can be misleading. Learn more →

Similarly Ranked Symptoms

Autonomic nervous system imbalance185 reportsSkin discolouration179 reportsUrinary tract infection173 reportsX-ray173 reports

Quick Facts

Reports:178
Deaths:1
Hospitalizations:17
% of Vaccine:0.4%
Rank:#165 of 2579

Related Pages

HPV (Gardasil) OverviewSeizure like phenomena (All Vaccines)Why Raw Numbers MisleadTop Symptoms Analysis

Data Source

This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.